# Curl
Curl (opens new window) is a command line tool and library for
transferring data with URLs. The following are examples of using curl
to
access the Knowledge Object and executing the Knowledge Object service.
Below examples of using curl
to access the
js simple hello world KO (opens new window)
KO Service.
Get the js simple hello world KO metadata using curl
curl -X GET \
https://activator-playground.herokuapp.com/kos/js/simple \
-H 'Content-Type: application/json'
Executing the js simple hello world welcome service using curl
curl -X POST \
https://activator-playground.herokuapp.com/js/simple/welcome \
-H 'Content-Type: application/json' \
-d '{"name": "Alex"}'